Thermostatically-controlled damper for air-cooled engines



April 931 E. s. MARKS 1,800,026

THERMOSTATICALLY CONTROLLED DAMPER FOR AIR COOLED ENGINES Filed Nov. 17. 1928 ild W gala MM ATTOR N EYS Patented Apr. 7, 1931 UNITED STATES PATENT OFFICE EDWARD S. MARKS, OF SYRACUSE, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO FRANKLIN DEVELOPMENT CORPORATION, OF SYRACUSE, NEW YORK, A COR- PORATION OF NEW YORK THERMOSTATICALLY-CONTROLLED DAMPER FOR AIR-COOLED ENGINES Application filed November 17, 1928.

This invention relates to air cooled internal combustion engines wherein the cooling air current is created by a fan and the current of air is directed over and around the cylinders, and has for its object a particularly simple thermostatically operated means controlled by the temperature of the engine for controlling the amount of air passed over the cylinders.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is an elevation, parts being omitted, of an internal combustion engine embodying my invention.

Figure 2 is a plan View of parts seen in Figure 1.

I have here shown my invention as applied to the type of engine shown in the patent issued to WVilkinson No. 1,624,453 issued April 12, 1927.

The engine itself may be of any form, size and construction. The engine here illustrated comprises cylinders 1 arranged one behind the other on the crankcase 2 and provided with fins and jackets 3 to provide a passage around the cylinders. The jackets provided on the cylinders are substantially as the kind shown in the Riker Patent N 0. 1,533,810.

The means for creating the air current comprises a blower, a centrifugal rotor or fan 4 located in a housing 5, the rotor being mounted on the front end of the crank shaft of the engine. The air is conducted from the housing to the cylinders by an air conduit 6 extending over the heads of the cylinders and communicating with the upper ends of the jackets 3. The front end of the conduit communicates with the outlet 7 of the fan housing, all as shown in the Wilkinson Patent No. 1,624,453 issued April 12, 1927.

The means for controlling the amount of air passed through the air conduit over the cylinders is shown as one or more dampers Serial No. 320,093.

as 8 mounted upon rock shafts 9 j ournalled at their ends in hearings in the outlet 7 of the fan housing above the fan.

10 designates a thermostat of any suitable constructlon located adjacent any one of the cylinders near the lower end of the jacket in order to be subject to the heat as the air is about to pass from the jackets.

The thermostat 10 is enclosed in a casing and neither the thermostat nor the casing form part of this invention.

As here shown, the thermostat is located between two of the cylinders at the lower ends of the jackets thereof. The thermostat is of the bellows type and the motion thereof is transmitted to the damper 8 in any suitable manner as by a rod 11 sliding near the side wall of the outlet 7 of the fan housin and connected to the rock shafts 9, the rod eing here shown as provided with a rack 12 mesh ing with pinions 13 on the rock shafts.

Normally, the dampers stand in closed position, and as the engine heats, and hence the cooling air current absorbs heat therefrom, the thermostat expands, thus opening the dampers more or less and varying the amount of air passed from the fan to the cylinders.

What I claim is:

1. An air cooling system for internal conibustion motors comprising the combination of a fan driven by the motor, a housing surrounding the fan and having inlet and outlet passages, a conductor for conducting air from the fan over the cylinders of the motor, a temperature responsive device associated with the cylinders of the motor whercby said means is directly influenced by the heat of the cylinders, a movable shutter mounted in the outlet passage of the fan housing and means connecting the shutter and the temperature responsive means whereby said shutter is actuated by the tem perature responsive means upon change of temperature of the cylinders of the motor.

2. An air cooling system for internal combustion engines comprising the combination with an internal combustion engine having cylinders provided with a jacket, :1 fan connected with theengine to be rotated thereby, a fan housing surrounding the fan and havmg inlet and outlet passages, a conduit extending from the outlet passage of the housthis .ninth day of ing over the heads of the cylinders and communicat'i-ng with the jackets, a temperature responsive device positioned along side of the cylinders at the lower ends of the jackets; a movable shutter located in the outletpas-- sage of the fan. housing and means connecting the temperature responsive means with.

the shutter whereby the shutter is moved to op en or closedv iposit-ion by the temp eratnr-e responsive means when the same is affected by the change of temperature of thecylinders.

of Onondaga, and ,inthe State of New-York;

November, 1928 EDWARD S. MARKS.

In? testimony whereof, I -havehereunto signed my'name, at *Syracusain the county 

